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NORTH FORK RESERVOIR

Structure dossier · WDID 1103300 · RESERVOIR · NORTH FORK SOUTH ARKANSA · DWR record

North Fork Reservoir is a reservoir on North Fork South Arkansa in Colorado. This page is its public record: the water it has a right to, whether it may take it today, and its history, compiled from the Colorado Division of Water Resources.

Source DWR administrative record · verify at DWR structure ↗ Source DWR administrative record · verify at DWR diversion records ↗ Source Our computation, scored against a reference · scored against DWR's call analysis, see /methods

Where this page's figures come from

Generated 2026-10-14 21:00 by Hydrohistorian. Sources: DWR HydroBase snapshot HydroBase_CO_20260928 (history) + CDSS REST (current), USGS NWIS cross-checks. Engine v0.5.0 (dd58e60) — every figure regenerates from this named code version and data image.

The record and the river

Where this structure is measured

GageFlowing nowRecordHow we know
NORTH FORK RESERVOIR OUTLET NSARSOCO 0.13 cfs 2012–2026, 4,567 days co-located, 21 m
NORTH FORK RESERVOIR ON N. FORK OF S. ARKANSAS RIVER NSARESCO — — co-located, 21 m

A green link is DWR's own: either its telemetry inventory maps this WDID to that station, or the station is named for this WDID (0700553 → 0700553A). An amber one is ours — the station sits within 250 m and shares a distinctive word with this structure's name, which is a strong hint rather than a DWR statement that this gage meters this structure. Wrong? Tell us.

In short

NORTH FORK RESERVOIR holds 8 decreed rights on NORTH FORK SOUTH ARKANSA. No active call senior to its rights reaches its district today (20 active calls checked), so it is in priority now. 17 further calls state no district and sit outside this one, so they are counted here rather than assumed either way. That is today's position; the weeks ahead cannot be projected for it: no call in the record verifiably applies to this district (statements and caller locations checked). In a median year over its last 15 recorded years it diverts 51 acre-feet. It was a party to 6 court cases that also touched 17 other structures.

Assembled from the figures on this page — every number above is checked against them before it is shown (7 checked). The detail, with its method, is in the cards below.

Download this structure

Everything on this page as data you can work with — and a README that makes it citable: the HydroBase snapshot it was built from, the build commit, what every column means, the method behind each derived figure, and that method's stated limits.

⇩ Full record (.zip) Print / save as PDF

Or one table at a time: rights.csv · annual_use.csv · curtailment_now.csv · court_cases.csv · co_parties.csv · call_climatology.csv

What is in the bundle
  • rights.csv — every decreed right, most senior first, with admin numbers, dates, amounts, uses and case numbers.
  • annual_use.csv — recorded diversion by year, with releases accounted separately.
  • curtailment_now.csv — each right's current priority status and how often it was out across analog years.
  • court_cases.csv — the cases attached to its rights.
  • co_parties.csv — the other structures that were parties to those cases. Not available anywhere else.
  • call_climatology.csv — how often each right has been out of priority by week of season, with confidence intervals and the seasons the record could actually judge.
  • README.txt — provenance, methods, limits, disclaimer, and links back to DWR's own records for verification.

Where it sits

Location as DWR records it (storage). Faint dots are the neighbouring water; click any to open it.

Dam safety

Dam NORTH FORK (completed 1953)
Hazard class High
Condition at last inspection Conditionally Satisfactory (2026-08-10)
Storage restriction None on file
Normal storage 602 AF
Physical status Active
Emergency action plan Yes

Source: DWR Dam Safety’s jurisdictional-dam inventory (damsafety/damsafetydaminfojd), refreshed weekly. DWR’s record for this dam carries no WDID and no matched NID id, so it is joined by name and position: “NORTH FORK” 0.167 mi away. More than half of Colorado’s jurisdictional dams can be reached no other way; judge the match before relying on it. Hazard class describes the consequence of failure, not the likelihood of it. DWR’s dam record.

Current administration

● In priority — no active call senior to this structure's rights affects its district (20 active call(s) checked).

17 further calls state no district and sit outside this one, so they are counted here rather than assumed either way.

Which of its rights are out of priority?

The outlook for the weeks ahead is not computable for this structure: no call in the record verifiably applies to this district (statements and caller locations checked). Today’s position is a separate question, and it is answered in Current administration above — that screen reads the district’s active calls and needs no reference gage.

Where it sits in line

Priority 1874-05-01 — 104th most senior of the 1491 structures with decreed rights in this water districtDWR's administrative subdivision of a river basin; the unit calls are usually stated in..

Under prior appropriationColorado's rule for sharing water: first in time, first in right. Age decides, not proximity or need., everything ahead of it in this line is satisfied in full before it receives any water. Immediately ahead: MONARCH SNOW MAKING DIV PT (1874-05-01). Immediately behind: SUPPLY DITCH (1874-05-12).

On NORTH FORK SOUTH ARKANSA at river mile 60.3, it is 2nd of 14 down the reach. Immediately upstream: ISLAND LAKE MIN LEVEL. Immediately downstream: HUNKYDORY LAKE MIN LEVEL.

Position on the modelled network, not a claim about whose water this is — a stream carries water from many rights at once, and diverted water returns to it.

Decreed rights (9)

Admin noDWR's numeric encoding of a water right's seniority. Smaller is more senior; the integer part counts days from 1849-12-31 to the date that ranks the right. AppropriatedWhen water was first put to beneficial use. It sets seniority unless a prior adjudication date is later. AdjudicatedWhen the water court confirmed the right. A use decreed in 1975 was not a decreed use in 1955, however old the appropriation is. AbsoluteA right actually put to use, as opposed to conditional -- a placeholder for a use not yet made. ConditionalA right reserving a place in line for a use not yet made; it must be diligently pursued or it lapses. Alt-pointAn absolute amount decreed at another structure that may be diverted here instead -- an alternate point of diversion or an exchange. DWR calls this the APEX amount; a right showing 0.0 absolute but an alt-point amount is exercised here under another structure's decree. Decreed forWhat the court said this water may be used for -- irrigation, municipal supply, augmentation and so on.Case
8887.00000 1874-05-011890-06-19 0.148 cfs 0.0 — Irrigation, Municipal +2 51
48464.00000 1982-09-091982-12-31 495.0 AF 100.0 AF — Irrigation, Municipal +3 82CW0204, 87CW0023 +1
48555.00000 1982-12-091982-12-31 0.0 AF 0.0 27.0 AF Municipal 82CW0104
50393.00000 1987-12-211987-12-31 0.0 cfs 0.0 34.8 cfs Municipal 87CW0061, 94CW0058 +1
55867.00000 2002-12-162002-12-31 0.0 cfs 0.0 30.0 cfs Municipal 02CW0180
56611.00000 2004-12-292004-12-31 0.0 cfs 0.0 2.23 cfs Augmentation 04CW0125, 21CW3064
57610.00000 2007-09-242007-12-31 0.0 AF 0.0 100.0 AF Storage 07CW0111
57610.00000 2007-09-242007-12-31 0.0 cfs 0.0 10.0 cfs Storage 07CW0111
58401.00000 2009-11-232009-12-31 0.0 AF 0.0 50.0 AF Storage, Municipal 09CW0138

Amounts marked cfs are flow rates; AF are stored volumes (storage rights are decreed in acre-feet). An absolute amount of 0.0 beside an alt-point amount is not a dead right: the water is decreed at another structure, and that row records permission to divert it here instead (an alternate point or exchange). A case listing several numbers reflects the original decree plus later change cases.

How much of this decree was in priority, by day

A right is in priority on a day when it is senior to every call administering this structure. Of its 0.148 cfs decreed rate, the average day over the last 6 year(s) had 0.143 cfs in priority (96% of the decree). No call in effect is a free river — that was 0.0% of days.

On 12 days some rights were in priority and others were not — seniority splits a decree rather than switching it off. Calls are set and released at a time of day, not at midnight, so a day is counted by the hour: a call setting at 4pm costs that day a third of its rate, not all of it.

This is paper water. It is the decreed rate that was in priority — not water that was physically in the stream, and not water this structure diverted. A ditch can be in priority for 50 cfs on a day the creek carries five. What that distinction means →

YearMean in priority (Apr–Sep) Share of decreeFree-river days Days fully out
2026 0.1 cfs 64% 0 59
2025 0.15 cfs 100% 0 0
2024 0.15 cfs 100% 0 0
2023 0.15 cfs 100% 0 0
2022 0.15 cfs 100% 0 0
2021 0.15 cfs 100% 0 0
Show the last 120 days, day by day
DateIn priorityControlling call
2026-10-14 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-13 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-12 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-11 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-10 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-09 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-08 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-07 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-06 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-05 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-04 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-03 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-02 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-10-01 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-30 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-29 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-28 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-27 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-26 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-25 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-24 0.148 cfs (100%) SUNNYSIDE PARK DITCH, 1884-01-03 · Arkansas River · on a river this source flows into
2026-09-23 0.148 cfs (100%) BESSEMER DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-09-22 0.148 cfs (100%) SOUTH CANON DITCH, 1880-10-01 · Arkansas River · on a river this source flows into
2026-09-21 0.148 cfs (100%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-09-20 0.148 cfs (100%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-09-19 0.148 cfs (100%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-09-18 0.099 cfs (67%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-09-17 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-09-16 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-09-15 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-09-14 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-09-13 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-09-12 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-09-11 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · on a river this source flows into
2026-09-10 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · on a river this source flows into
2026-09-09 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · on a river this source flows into
2026-09-08 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · on a river this source flows into
2026-09-07 0.0 cfs (0%) BESSEMER DITCH, 1867-01-08 · Arkansas River · on a river this source flows into
2026-09-06 0.0 cfs (0%) ROCKY FORD HIGHLINE, 1869-07-01 · Arkansas River · on a river this source flows into
2026-09-05 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-09-04 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-09-03 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-09-02 0.049 cfs (33%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-09-01 0.148 cfs (100%) FORT LYON CANAL, 1884-04-15 · Arkansas River · on a river this source flows into
2026-08-31 0.148 cfs (100%) FORT LYON CANAL, 1884-04-15 · Arkansas River · on a river this source flows into
2026-08-30 0.148 cfs (100%) FORT LYON CANAL, 1884-04-15 · Arkansas River · on a river this source flows into
2026-08-29 0.148 cfs (100%) BESSEMER DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-08-28 0.148 cfs (100%) BESSEMER DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-08-27 0.148 cfs (100%) BESSEMER DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-08-26 0.148 cfs (100%) BESSEMER DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-08-25 0.099 cfs (67%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-24 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-23 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-22 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-21 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-20 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-19 0.049 cfs (33%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-18 0.148 cfs (100%) WILLIAMS & HAMM DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-08-17 0.148 cfs (100%) WILLIAMS & HAMM DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-08-16 0.099 cfs (67%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-15 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-14 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-13 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-12 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-08-11 0.0 cfs (0%) ROCKY FORD HIGHLINE, 1870-12-31 · Arkansas River · on a river this source flows into
2026-08-10 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-08-09 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-08-08 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-08-07 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-08-06 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-08-05 0.0 cfs (0%) ROCKY FORD HIGHLINE, 1869-07-01 · Arkansas River · on a river this source flows into
2026-08-04 0.049 cfs (33%) ROCKY FORD HIGHLINE, 1869-07-01 · Arkansas River · on a river this source flows into
2026-08-03 0.148 cfs (100%) BESSEMER DITCH, 1881-06-20 · Arkansas River · on a river this source flows into
2026-08-02 0.148 cfs (100%) FORT LYON CANAL, 1884-12-03 · Arkansas River · on a river this source flows into
2026-08-01 0.148 cfs (100%) FORT LYON CANAL, 1884-12-03 · Arkansas River · on a river this source flows into
2026-07-31 0.148 cfs (100%) FORT LYON CANAL, 1884-12-03 · Arkansas River · on a river this source flows into
2026-07-30 0.148 cfs (100%) SOUTH CANON DITCH, 1882-05-31 · Arkansas River · on a river this source flows into
2026-07-29 0.148 cfs (100%) ROCKY FORD DITCH, 1874-05-15 · Arkansas River · on a river this source flows into
2026-07-28 0.148 cfs (100%) ROCKY FORD DITCH, 1874-05-15 · Arkansas River · on a river this source flows into
2026-07-27 0.148 cfs (100%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-07-26 0.148 cfs (100%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-07-25 0.148 cfs (100%) ROCKY FORD DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-07-24 0.099 cfs (67%) ROCKY FORD DITCH, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-23 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-07-22 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-07-21 0.0 cfs (0%) CANON CITY & OIL CREEK, 1867-05-31 · Arkansas River · on a river this source flows into
2026-07-20 0.0 cfs (0%) OXFORD CANAL, 1869-07-01 · Arkansas River · on a river this source flows into
2026-07-19 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-18 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-17 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-16 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-15 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-14 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-13 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-12 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-11 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-10 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-09 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-08 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-07 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-06 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-05 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-04 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-03 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-02 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-07-01 0.049 cfs (33%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-06-30 0.148 cfs (100%) WILLIAMS & HAMM DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-06-29 0.148 cfs (100%) BESSEMER DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-06-28 0.148 cfs (100%) BESSEMER DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-06-27 0.148 cfs (100%) BESSEMER DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-06-26 0.148 cfs (100%) BESSEMER DITCH, 1875-12-31 · Arkansas River · on a river this source flows into
2026-06-25 0.099 cfs (67%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-06-24 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-06-23 0.0 cfs (0%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-06-22 0.049 cfs (33%) PBWW NORTHSIDE INTAKE, 1874-04-01 · Arkansas River · on a river this source flows into
2026-06-21 0.148 cfs (100%) FORT LYON CANAL, 1882-05-31 · Arkansas River · on a river this source flows into
2026-06-20 0.148 cfs (100%) FORT LYON CANAL, 1882-05-31 · Arkansas River · on a river this source flows into
2026-06-19 0.148 cfs (100%) ROCKY FORD DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-06-18 0.148 cfs (100%) ROCKY FORD DITCH, 1882-03-31 · Arkansas River · on a river this source flows into
2026-06-17 0.148 cfs (100%) ROCKY FORD DITCH, 1874-05-15 · Arkansas River · on a river this source flows into
How this is worked out, and what it cannot tell you
  • This is a decreed rate that was in priority -- paper water, not water that was available or diverted.
  • Augmentation plans, exchanges and substitute supply plans let a structure divert lawfully while out of priority; none are modelled.
  • Calls on the river this source flows into are included without a position test, so curtailment can be over-reported where the calling point sits above the confluence.
  • DWR's administration is the authority. Scored against DWR's own call analysis, this method agreed on 95.5% of 85,822 structure-days (2026-08-29).
  • Calls considered for this structure: 1871, of which 1871 sit on a river it flows into.

Recorded use (last 15 years on record)

Years far under the decreed amount? That gap has a name — paper water vs. wet water, explained on this structure.

In a median year this structure has a recorded diversion of 51 AF. Its most recent year on record, 2025, came in at 0 AF — 0% of that, and 1st lowest of the 15 years with a recorded volume.

This structure records both diversions and reservoir releases — they are separate water movements and are accounted separately below.

YearDiverted (AFA volume: one acre covered a foot deep, about 326,000 gallons -- roughly a suburban household's outdoor use for a year.)Compared with its own recordReleased (AF)Days recordedPeak (cfs)
2010 72 11th lowest of 15 · 141% of median 15 68 4.5
2011 59 9th lowest of 15 · 116% of median 9 53 1.4
2012 84 12th lowest of 15 · 165% of median 1 15 14.1
2013 51 8th lowest of 15 · 100% of median 17 25 16.8
2014 16 4th lowest of 15 · 31% of median 86 153 0.2
2016 32 6th lowest of 15 · 63% of median 30 170 0.2
2017 32 6th lowest of 15 · 63% of median 13 153 0.3
2018 114 13th lowest of 15 · 224% of median 100 34 2.0
2019 117 15th lowest of 15 · 229% of median — 233 2.0
2020 116 14th lowest of 15 · 228% of median — 103 15.5
2021 69 10th lowest of 15 · 135% of median 27 245 0.4
2022 16 4th lowest of 15 · 31% of median 0 304 0.1
2023 0 1st lowest of 15 · 0% of median 0 2 0.0
2024 0 1st lowest of 15 · 0% of median 0 61 0.0
2025 0 1st lowest of 15 · 0% of median 0 304 0.0

How good is our record of it?

Grade B (8/10 points) — the components below are the finding; the letter alone is not.

The rubric, component by component
CheckStateDetail
identity complete name, type, and water source all on file
decreed rights on file 9 right(s), seniority decoded
diversion record current 2435 measured days, newest 331 day(s) before the data's end (DWR publishes ~1 year in arrears)
record continuity sparse 30% of the irrigation seasons in 1987-2025 carry measured days
published-record stability stable no upstream revisions recorded against this structure

Advisory reading aid on public data — not an administrative or legal conclusion, not a title opinion, and not a substitute for DWR administration or an engineer's analysis. Methodology review status is disclosed at hydrohistorian's basin pages.

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